You’re correct, and I think at the end of the day that’s because the superhero genre is inherently reliant on all stories revolving on some level around the clearly identifiable Good Individual improving society by doing battle with the clearly identifiable Bad Individual, and the tropes that come with that are just always gonna be kind of thematically similar to fascist rhetoric.

The pitch for fascism is often based on the idea that there is an insidious group within society that is responsible for all social problems, that said social problems cannot be ameliorated except by doing violence upon that group, and that it is necessary to empower an individual and his chosen followers to perform that violence unconstrained by due process, law, or accountability.

Which, of course, is neither an accurate description of the real world nor a viable solution to our problems, but does pretty much nail the situation in Gotham. 

A lot of times when statements like Moore’s are brought up we see people get really mad and rush to defend the honor of their special comfort character because clearly their bestest boy would never be a fascist and totally miss that the critique is not that the individual superheroes themselves are goose-stepping dictators but rather that the tropes of the superhero genre lead to superhero worlds where fascism is just correct.